In the rich text editor:
@Viktoriosv
In a comment:
[Viktoriosv](https://www.chowlings.com/user/Viktoriosv)
For Names and Avatars:
In the rich text editor:
%Viktoriosv
In a comment:
[](https://www.chowlings.com/user/Viktoriosv) [Viktoriosv](https://www.chowlings.com/user/Viktoriosv)